It’s not much bigger than a (large, fat) thumb — but this PhoneSuit Flex battery has more juice than all but the very, very largest iPhone battery cases. While it’s been available in 30-pin and Android/micro-USB flavors for months, it’s now also available for the iPhone 5.

One of my bikes has a bottle dynamo that presses on the tire and powers the front lamp. The Siva Cycle Atom is a modern-day equivalent, only it won’t rub away your tire or slow you down, and it’ll charge your gadgets instead of just running your lights.

Photojojo’s Crankerator is a backup battery pack with a twist. Or rather, with a spin. You can charge it via boring old wall outlets, but when the juice finally runs low, you can reanimate it with a few twists of the crank-arm on the side.

Amen! A charging case designed for the iPhone 5. Mophie’s new Juice Pack Helium ($79) is one of the first of its kind that work with longer iDevice, so if you find your i5’s often running in the red battery zone by noon each day, read on for the full review. This sleek and slim charging case might just be exactly what you need.

Even if the only traveling you do is from your home to your office, and even if that “office” is actually just your bedroom, then you will probably find the PlugBug wicked useful. But if you ever leave your home country’s own shores, then you might consider the PlugBug World, a globally-aware charger for your MacBook and iDevices.

We showed you a handful of fantastic, instant keyboard shortcuts to shut down, reboot, or sleep your Mac, but an even safer way is to bring up the Power button dialog box that happens when you hit the, well, Power button on your Mac. That’s the one in the upper right corner of the keyboard on most modern Macs, while some older Macs have it as a separate button integrated into the body of the Mac itself.

Either way, hit that Power button and then you can use the following keyboard shortcuts to activate the different options in the dialog.

You probably don’t give much thought to your chargers – after all, they come bundled with your devices, and Apple’s especially are mostly well-designed (MagSafe 2). But Kanex’s DoubleUp – which I took with me on a recent whistle-stop tour of Las Vegas and San Francisco – is worth a look if you travel a lot, or even if you just want something a little better, and a little more convenient, than Apple’s free option.

The one big advantage of traveling in the U.S is that I get to use your crappy, cheap-ass two-pin power plugs. I love that these small pieces of junk can fold up even smaller. Compare this to taking a vacation to the UK, where the adapters are the size of 1980s-era cellphones and young citizens have to be trained in the use of their safety features.

All of which is a roundabout (and culturally insulting) way to say I love Quirky’s new Pivot Power Mini, a tiny lightbulb-sized adapter which converts a single socket into two USB ports and a pair of power-points.

As we all know, sometimes the simplest ideas are the best. You can usually tell when an idea is a winner because it seems so obvious that somebody should have made it already. And the Tethercell is one of these ideas: it’s a remote control battery that will let you switch any AA-powered device on and off from your iPhone.